Lock.



No. 886,139. PATENTED APR. 28, 1908 A. LAWRENCE.

LOOK.

APPLICATION FILED NOV. 20, 1907 2 SHEETS-SHEET 1.

I 1 INVENTOR mun I r A Home PATENTED APR. 28, 1908.

A. LAWRENCE.

LOOK.

APPLICATION FILED NOV. 20, 1907.

2 SHEETS-SHEET 2.

[I'ENTOR Win @5555 d/fimxw /i f imam/1 UNITED @Eirififll% ALFREDLA\\"RENCE,-OF STAHFORD, CONNECTICUT, ASSIGUOR TO THE YALE A TOWNE 7MANUFACTURING COMPANY, OF STAMFORD, CONNEGTIPUT.

LOCK.

Specification of Letters Patent.

Patented April as, ices.

Application filed November 20, 1907. Serial No. 403,03i.

T all whom it may concern:

Be it known that I, ALFRED LAWRENCE, ot' Stamford, in the county ofFairfield and State of Connecticut, have invented certain new and usefulimprovements in Locksj and I do hereby declare the following "to be alull, clear, and exact description of the invention,

such as will enable others skilled in the art to which appertains tomake and uso the same.

My invention relates to an improvement in locks, the object of theinvention being to provide a lock with a key actuated means whereby whensuch means are actuated by its kc all other keys such as guests key,chambermaids key or any other n'iaster keys are rendered inoperative.

My invention consists in the parts and combination of parts as will bemore hilly described and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in elevation of thelock with its face plate removed showing the bolt in its retractedposit-n with its tumbler arranged to be operated by any one of the keys.2 is :1 similar view showing the bolt and "position of the tumblersalter the toriiier has been moved to its locking position by any of thekeys except the onel shall hereafter term the emergency key. Fig. 3 isit view showing the bolt and position of tumbler after the former hasbeen thrown to a locked position by the emergency key. Fig. 4 is a viewin plan. of the bolt. Fig. 5 is similar view of one of the. ordinarytumblers. Fig. '6 is a view of the emergency tumbler. Fig. 7 is a viewof a key for actuating all the tumblers and dis it view ofthe emergencykey;

The look to which this improvement is applied isiliitended primarily foruse in hotels or offices, where one key is held by a guest or tenant,and a master key by the janitor or: charnberinaid, but it is equallylocks where but a single pass in. all, except the holder of vncy k thefunction of the latter key being, to permit the owner, or otlieerholding sump, to render the pass key, or master key, and. any Utlltl:

keys, inoperative, thus locking the room against entrance except bytheyemergency key. 1 represents the casing ot inn? ird in cry l mortiselock, 2 is the hitch and il the knob. spindle roll hacks for operatingtheit tch. t

is the bolt provided with the fence 5 and cut away at rear end to beengaged by the keys. Mounted on the fixed stud 6 is a series of maintumblers 7, each of which is provided adjacent to its rear end ivithagate or slot it in which the post or fence on bolt 4 rests and moves,each tumbler being. provided with one or more shoulders 10 projectingvertically into the or slot and adapted to bear against the stud 6 onthe bolt and lock the latter against endwise movement.

By the use of any one of the proper keys the tllll'lblQIC are so movedas to csrry tho shoulders 10 to positions above or below the post, asthe case may be, thus permitting the post to move horizontally from oneend of the gate or slot to the other, and when the limit of movement ofthe bolt has been reached, either in or out, the shoulders fall in frontor behind the fence and thus lock the bolt in its position.

Any one of the-proper-keys, such as guests, chaniher-maids, or any othermaster he or the emergency key can operate the tomb ere, so as to permitthe bolt to be thrown to its unlocking position, but when the bolt isthrown in its locking position by the emergency key, the door can beunlocked only by the emergency key, all the other keys being renderedineil'ective or inoperative. This result is accomplished by theemergency turnbler 9 which latter is mounted on the fixed stud 6, whichas before explained carries other tumblers. T his tumbler 9 is providedWith a slot or gate and instead of being provided with one or morevertical shoulders, is

provided with a horizontal centrally located tongue l2, )rojectingroarwardlyytroni the front Wall 0 the gate or slot, the underside of itsfree end. being rounded or beveled.

in the operation of the lock all the keys,

but the emergency key shifts all the tum-1 icludin the emergencytumbler, and

blcrs in throwing the bolt to its locking; position, all the change ormaster keys shii't t to emergenry tumbler sulliciently for the fence toengage the curved or inclincdi'oce oi the After the lence makes contactwith, the under face of the tongue the continuedi J. V tongue.

' now retmctmg and the emergency key is minutes ward for ehgeging thisemergency tumbler but e11 geges or moves all the others, hence when theemergency key is ir'lserted and turned to throw the bolt, the emergencytumbler 9 is not moved end as the bolt is moved to 'its locking positionit passes ebcve 'the finger '12 on the emergency tumbler, and when the:bolt reaches its lockin osition the shoulder on the tumblers fellhiudthe fence thus locking the letter in e position above the tongue onthe emergency tumbler '9 and inits keys, hut-efter it as been actuatedby the emergency'hey, all other keys ereren deredjnefiective until ithas been by the emer eucy key, 15 2-. It is 'eyi eat that menyslightchanges might be resorted to in the relative arrange ment of parts shownand described Without retracted I depertinfifrom the spirit and scope ofmy in yention ence I would have it understood that I d0-n0t ish toconfine myself to the exact construotiiiu qflperts shown end tie?scribed, bint,.

Heving fully 01 eeerihecl my invention. whet I claim. as new and desireto secure by L g t'ere-Petent, is

*revent the tml'eehinq r. L

eeeree 1; The comlzheti'eh with e leek the bolt of relity efikeys, oneof which is an emergency which. is adapted to he eetueteel by a. pluvkey, of en 'emer q'emsy tumbler; edepted when thehel t is thrown to'itelocked posi tion by the emergency key to prevent the operation of anyone of the other keys.

2. A look comprising :2 bolt and tumbler mechanism edeeted heectueted byany 0 i p one or e serres or keys meludmg en emergen'c hey, end'meens,operehlewhen the tum ler mechemsm end halt heve beenec.

tueted by the emergency hey, to preyent the operetion of the tumblersother he 3. ll tumbler mechanism edepted to be actuated by any one of eseries of keyeincludin an emergeneykey end eu eme eney tum ler or boltby eriy f eh -eemrielng e bolt" end. meih operable when the main tumblermechanism and bolt heyefheen eetue'tecl ency key to prevent gels, ofehy-otherkey. In. at loch the comhineticn With'eholt, end e series 'ofmain tumblers. eslelptecl tebe actuated; by a plurality ofkeye'ineludihg en teetecl by all the keys except me emergency key,endmlepted, when the bolt ie'thrown to its locking position theemergency heyto other hey. 1 a .ln testimoey epeeifieetieh in the mgWlil'ilQSSBFB. v

' LAWRELNSE. J /itnesses:

*FJV. Thyme.

l v l "1- Cmetes Were.

by the emer-- the retetxon m the movement of .eny

Whereef, 1 here this presence of twe sphserlhemergency key, of emergenctumbler ec

